{"id":17635,"date":"2018-11-24T17:55:56","date_gmt":"2018-11-24T17:55:56","guid":{"rendered":"https:\/\/www.simscale.com\/?page_id=17635"},"modified":"2025-07-17T17:04:06","modified_gmt":"2025-07-17T17:04:06","slug":"dynamic","status":"publish","type":"page","link":"https:\/\/www.simscale.com\/docs\/analysis-types\/dynamic\/","title":{"rendered":"Dynamic"},"content":{"rendered":"\n

The Dynamic<\/strong> analysis type allows the time-dependent calculation of displacements as well as stresses and strains in one or multiple solid bodies. In contrast to static analysis, inertia effects are taken into account. Additionally, the time steps performed represent real time. The solver used to perform dynamic analysis in SimScale is Code_Aster<\/a>.<\/p>\n\n\n\n

In the post-processor, it is possible to analyze single time steps as well as the dynamic performance as a function of time. Similar to a static<\/a> analysis, you can check for undesired deformations, or critical stresses and modify your design based on those learnings.<\/p>\n\n\n\n

\"dynamic<\/a>
Figure 1: Stresses on a skull due to impact with (left) and without (right) a helmet<\/figcaption><\/figure>\n\n\n\n

Creating a Dynamic Analysis<\/h2>\n\n\n\n

To create a dynamic analysis, the first step is to click on the desired geometry and then on ‘create simulation<\/strong>‘:<\/p>\n\n\n

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\"creating<\/a>
Figure 2: Creating a new dynamic analysis<\/figcaption><\/figure>\n<\/div>\n\n\n

Afterward, a window with several analysis types appears. Choose the desired type from the list.<\/p>\n\n\n\n

\"dynamic<\/a>
Figure 3: Steps to create a dynamic analysis in SimScale<\/figcaption><\/figure>\n\n\n
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\"dynamic<\/a>
Figure 3: Steps to create a dynamic analysis in SimScale<\/figcaption><\/figure>\n<\/div>\n\n\n

In the following, the different simulation settings you have to define are described. You will also find links to relevant documentation.<\/p>\n\n\n

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\"simulation<\/a>
Figure 4: Simulation tree showing entries for a dynamic analysis type<\/figcaption><\/figure>\n<\/div>\n\n\n

Geometry<\/h2>\n\n\n\n

The geometry<\/em> tab contains the CAD model used for the simulation. Details of CAD handling are described in the pre-processing<\/a> section. For more information on the CAD upload process and the subsequent steps please read our standard documentation<\/a>.<\/p>\n\n\n\n

Contacts<\/h2>\n\n\n\n

If you have an assembly of multiple bodies that are not fused together. All contacts in the system are automatically detected when a geometry is selected for a dynamic analysis. By default, they are set to bonded<\/em>. Sliding<\/em> contact and cyclic symmetry<\/em> are also available. For more information about contacts check this page<\/a>.<\/p>\n\n\n\n

In the physical contacts<\/a> tab, you can define contact pairs of faces or face sets. The distance between these faces is monitored during the simulation. If they touch each other, the interaction forces that prevent those faces from interpenetrating are taken into account. <\/p>\n\n\n\n

The solution methods for physical contacts are available below:<\/p>\n\n\n\n